Originally Posted by Air21

I would think GM will have a cast version for the z06 to keep up with the vipers 550 hp

Originally Posted by Y2K2LS1

Does GM really "need" to compete with the viper? 50k vs 80k?? The vette is supposed to be fast and still practical, unlike the viper.

Originally Posted by Dope

LS2 is supposed to be a 4" bore normal 2v engine. It's the LS7 (apparently) that's gonna be the 6.3L 3 valve engine (500hp?).

LS2 block with an eagle 4" would be an easy 408. I was under the impression it was just an aluminum version of the iron 6L block.

Dope

Originally Posted by Y2K2LS1

Ok with all the recent talk of the ls2 block, the biggest news ive heard (from here) is that it will be a 4" bore. But aren't there some other factors involved that need to be right in order for us to use this block? If the 3v heads are an inch wider than ours, how the heck are our ls1/6 heads going to fit that? What about the front of the motor, cover and placement and mounting of all the accessories? What about the oil pan and clearance for the k member?

I almost want to jump to a conclusion that i can just buy one of these bad boys and throw a new eagle 4" into it and have a 400 inch shortblock for not much money. But will it really work? I know its still "early" but what the heck, we might as well start thinking about it.

Originally Posted by SSInnovations

I work for GM R&D and what I keep hearing is that the LS2 is for sure an aluminum 6.0 block, much like the LS1 but with slight revisions that make LS1 internals incompatible. The bore is 4.00� but I believe the stroke is the same as the LS1�s. From what I gather they did not go with overhead cams and stuck with the 32 valve set-up. As far as the ZO6 goes, we have to wait until 2006 because they are not releasing it until then. There was some serious talk a while back that the new Z�s will have a 427, or at least a limited number of them will. Regardless, the new coupes will be starting around 55,000 and the convertibles close to sixty, that�s puts the Z�s at least in the mid sixty�s. Most of this is still rumors and people directly involved on the project are being pretty tight lipped. I would definitely put money on a 427 in the future though, and f@#$ Vipers, they handle like **** and you could never reliable put over 100,000 miles on one. I can�t wait until these thing start getting wrecked and we are able to pick up some bone stock motors with serious *****.